Mattress



FIG. 1 is a top perspective view of a mattress of the present invention.

FIG. 2 is a right side view of the mattress of FIG. 1 with the left side being a mirror image thereof.

FIG. 3 is a right end view of the mattress of FIG. 1 with the left end being a mirror image thereof.

FIG. 4 is a top view of the mattress of FIG. 1; and,

FIG. 5 is a bottom view of the mattress of FIG. 1

The portions of the mattress shown in broken lines are included for the purpose of illustrating environment and form no part of the claimed design. The portions of the body support shown in broken lines having unequal length segments illustrate the boundary of the claimed design and form no part of the claimed design. 

CLAIM I claim the ornamental design for a mattress, as shown and described. 